Question

位置有：lat和：lng用于＆＃39; geokit-rails＆＃39;我正在运行Rails 4。

是否可以对在指定位置范围内具有曲目的不同集合执行查询？

class Location < ActiveRecord::Base
  belongs_to :locatable, polymorphic: true
  acts_as_mappable
end

class Tracks < ActiveRecord::Base
has_one :location, as: :locatable
belongs_to :collection
end

class Collection < ActiveRecord::Base
  belongs_to :user
  has_many :tracks
end

Answer 1

要在grokit-rails中使用polymorphic，你必须通过:: location添加acts_as_mappable到你的Tracks模型：

class Tracks < ActiveRecord::Base
  has_one :location, as: :locatable
  acts_as_mappable through: :location
  belongs_to :collection
end

查询必须是：

@collection.tracks.joins(:location).within(distance, :origin => @origin)

Geokit-Rails：多态位置查询

1 个答案: